In Connman 1.0, default connections are no longer generated in code, but by using a settings file. A default settings file needs to be generated and added to the build system. It will default to wired connection.
I presume this is talking about the 1.0 upgrade that isn't yet merged into oe-core yet. This isn't entirely true - when there is no system configuration file all technologies are disabled *apart from ethernet*. Closing invalid, unless I totally misunderstood.
No answer from Cristian, so setting this to VERIFIED